Fuller-mill pusher.



` APPLICATIONl FILED NOV. I2. l9l4. y 1,209,101.v Patented 11611193916.

2 SHEETS-*SHEET I.

I "narran remmer l ermeag'l;

CHARLES B. ANDtEl/VS, OF HGH BRIDGE, NEW JERSEY, ASSIGNOR'TO TAYLOR- l XVHARTON IRON .AND STEEL COMPANY, OF HGH BRIDGE, NEW JERSEY, A COR- POEATION GF NEW JERSEY.

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Spccicaticn of Letters Eatent.

Laoegiei,

.Application efi November 12, 18M. Serial No. 871,844.

To all lwhom' t may concer-a:

Be it known that l, CHARLEs B. ANDREWS, acitizen of the United States, residing at High Bridge, in Hunterdon county, State of `New Jersey, have invented the 1following desists more particularly inl a formation of the pusherswhereby an improved act-ion upon and of the balls 1s secured, as well ascertain other advantages hereinafter made apparent.

' In the accompanying drawings: Figure 1 is a vertical sectional view of. so much of a 'mill of the type referred' to, asis necessary for an understanding of the improvement;

Fig. 2 is a perspective view on an enlarged -scale,showing a pusher in contact with a ball as in the actof impelling it around the Iring, the yoke arm bein in section; Fig. 3 is a sectional plan view o the balls, ring, yoke and pushers, the mill being at rest; and Fig. t is a perspective view of one of the pusher elements removed.

The general constructionand relation of the grinding ring 2, balls 3 and yoke 4, with its arms 5 mounted on a revolving shaft 6, are welf' known to the art and require no C detailed explanation; and it is to be understood that, as regards the particular form and arrangement of parts of the mill, other than the pushers 7, the drawings are purely illustrative of the l type of mill known in the trade as the Fuller mill. The said push.- crs are massive metal bodies, preferably of specially hard and tough material, and are socketed for removable mountinf on the endsof the radial arms 5, the soc (ets, 8 extending irom thenner face of each to within a short distance of the outer vface and being -'square to conform to lthe shape of the arms, and the securing of the pushers on the arms being eil'ected by pins 9 secured by cotters 10, all as' usual.

In my improvement the active side faces 1l of the pushers, which Contact with and impel theballs when the mill is in operation,

are ofspecial formatioinbeing convex in horizontal section and approximately straight vertically, and for' general purposes may be regarded'as substantially cylindrical,though a truel circular curvature is'not essential. liurthermore, the pushers are hilaterally symmetrical with respect to their sockets,

each therefore possessing duplicate active faces, which are interchangeable one for the other by removing the pusher i'rom the arm and replacing it in reversed position. In the outer portion of the pusher, an aperture l2, materlally `:smaller than the socket and opening through the end face 13 thereof, facilitates this removal, which is often ditiicult owing to the product of the mill pack ing between the yoke arm and sides of the socket. This aperture, however, does not give rise to. Wear and looseness due to materlal working outward through the socket,

' between the sides of the same and the arms, because the saidend face surrounding the aperture is sufficient to arrest the particles,

rareneeu nec.. ie, 191e;

tion, which is dependent upon the rolling ac` tion, preserving their roundness and reducingthe power necessary for driving, the results in these r.particulars being substantially better than with the ordinary pushers havin concave active faces wherein the balls are li ely at times to become gripped and 'pushed' with a sliding instead of a rolling At the same time the vertical'.

movement. disposition of the convex workmg faces of my -pushers insures the propelling forcev acting at all times against the balls in a horizontal plane and permits them to remain in their' course by their own considerable weight without any tendency on the part of the pushers to throw them upward. This Iremains true irrespective of wear, to which the yoke is naturally subject, since the cylindricalcurved lpushers, even though gradually lowered, alwa s impel the balls horizontally. The pus ers. being alike on both sides may be reversed when their forward faces becomeunduly worn', and will then of course serve for a second period -of use.

1. In a grinding mill, a grinding ring and balls adapted to roll in Contact therewith to crush the material, in combination with a yokeand pushers thereon between the balls consisting of massive bodies formed with sockets whereby they are mounted iXedly on the ends of the yoke arms, said pushers having approximately vertical cylindrically convex impelling faces adapted at all times to act horizontally upon the balls.

2. A pusher for a mill of the type described consisting of a massive metal body formed With'a socket whereby it may be Xedly mounted on the end of an arm and having an approximately vertical cylindricallv curved impelling face.

face of the pusher and opening through the end face of said socket.

In testimony whereof, I have signed this specilication in the presence of two Witnesses.-

CHARLES B. ANDREIVS. Witnesses:

W S. SToTHorr, L. R. SPILLAN. 

